<!doctype html>
<html lang="en">
	<head>
		<meta charset="utf-8">
		<meta name="viewport" content="width=device-width, initial-scale=1">
		<meta name="author" content="Adrian Toșcă">
		<meta name="description" content="Scan QR Code from Video File with ZXing javascript library">
		<title>ZXing | Demo</title>
		<link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Roboto:300,300italic,700,700italic">
		<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/normalize/3.0.3/normalize.css">
		<link rel="stylesheet" href="//cdn.rawgit.com/milligram/milligram/master/dist/milligram.min.css">
	</head>
	<body>

		<main class="wrapper">

			<section class="container" id="demo-content">
				<h1 class="title">Scan QR Code from Video File</h1>
				
				<p>This example shows how to scan a QR code with ZXing javascript library from a video file. The example decodes from an url and shows the video while decoding, however is also possbile to decode without showing the video.</p>

				<div>
					<a class="button" id="startButton">Start</a>
					<a class="button" id="resetButton">Reset</a>
				</div>

				<div>
					<video id="video" width="200" height="300" style="border: 1px solid gray" muted="muted"></video>
				</div>

				<label>Result:</label>
				<blockquote>
					<p id="result"></p>
				</blockquote>
				
				<p>See the <a href="https://github.com/aleris/zxing-typescript/tree/master/docs/examples/qr-video/">source code</a>  for this example.</p>

			</section>

			<footer class="footer">
				<section class="container">
					<p>ZXing TypeScript Demo. Licensed under the <a target="_blank" href="https://github.com/aleris/zxing-typescript#license" title="Apache License, Version 2.0">Apache License, Version 2.0</a>.</p>
				</section>
			</footer>

		</main>

		<script type="text/javascript" src="../zxing.qrcodereader.min.js"></script>
        <script type="text/javascript">
			window.addEventListener('load', function() {
				const codeReader = new ZXing.BrowserQRCodeReader()
				console.log('ZXing code reader initialized')

				document.getElementById('startButton').addEventListener('click', () => {
					const videoSrc = 'qrcode-video.mp4'
					codeReader.decodeFromVideoSource(videoSrc, 'video').then((result) => {
						console.log(result)
						document.getElementById('result').textContent = result.text
					}).catch((err) => {
						console.error(err)
						document.getElementById('result').textContent = err
					})
					console.log(`Started decode for video from ${videoSrc}`)
				})

				document.getElementById('resetButton').addEventListener('click', () => {
					codeReader.reset()
					console.log('Reset.')
				})

			})
		</script>

	</body>
</html>